linux-kernel - Re: [PATCH v4] regulator: qcom-saw: Add support for SAW regulators

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Message-ID: <20160219160712.GV18327@sirena.org.uk>
Date:	Sat, 20 Feb 2016 01:07:12 +0900
From:	Mark Brown <broonie@...nel.org>
To:	Georgi Djakov <georgi.djakov@...aro.org>
Cc:	lgirdwood@...il.com, andy.gross@...aro.org, lina.iyer@...aro.org,
	sboyd@...eaurora.org, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v4] regulator: qcom-saw: Add support for SAW regulators

On Tue, Feb 09, 2016 at 03:12:29PM +0200, Georgi Djakov wrote:
> The SAW (Subsystem Power Manager and Adaptive Voltage Scaling Wrapper)
> is part of the SPM subsystem. It is a hardware block in the Qualcomm
> chipsets that regulates the power to the CPU cores on platform such as
> apq8064, msm8974, apq8084 and others.

Following on from the discussion we had here and a bit off offline
discussion with Stephen it seems that we need to drop this since having
it in the DT as a separate regulator doesn't really represent the
hardware.  The SAW is controlling the underlying PMIC regulator and we
will eventually need to control that regulator directly so the SAW
should be presented as an alternative control interface for the PMIC
regulator.

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